An economy consists of three workers: Sean, Bob and Eric. Each works 10 hours a day and can produce two services: mowing lawns and washing cars. In an hour, Sean can either mow 2 lawns or wash 1 car; Bob can either mow 1 lawn or wash 1 car; and Eric can either mow 1 lawn or wash 2 cars.

Determine how many lawns will be mowed and how many cars washed per day:

Lawns mowed cars washed

1. All three spend their times mowing lawns
2. All three spend their time washing cars
3. All three spend half their time on each activity
4. Sean spends half his time on each activity while Bob only washes cars and eric only mows lawns